Transfer Belt Drive - Samsung CLX-9201 Service Manual

2. Product Specifications and Description

2.5.3.2. Transfer belt drive

■ Drive motor
The ITB drive motor[A] drives the transfer belt[B] by using gears and the ITB drive roller[C].
■ ITB speed control
This printer uses the encoder disc to control the transfer belt speed. The encoder[A] is on one of the guide rollers[B]. This
encoder checks the rotation speed of the transfer belt. The controller analyzes the signals from the encoder. Then it adjusts
the rotation speed of the transfer belt.
The encoder contains a disk that has 550 notches on its surface. These notches are read by the sensor [C]. The controller
counts the number of notches that the sensor has read in the unit of time. If the sensor has read an unusually large number
of notches or an unusually small number of notches, the controller ignores such unusual signals. Therefore, an incorrect
reading does not affect the rotation speed.
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